Mortising-machine.



H. UNVERZAGT. A Nomisma mennen.

.APPLICATION FILED AUG.` 13, 1910.

- vPatented Dec.'24,1912.

2 SHEETS-41121112.

d m #fo l "cumul/1 PLANocRAPH C0.. WASHINGTON. D. C.

onirica. i,

HERMANN UNVERZAGT, on NoRDHAUsEN, GERMANYL' i ivronTrsING-MACHINE.

Specification of Letters Patent.

' App'iicauon med Augiist 13,1910. serial No. 577,076.

Patented Dec. 2,4., 1912,.

To all whom it may concern.

Be it known that 1, 'HERMANN UNvnRZAGT, engineer, a subject of the German Emperor, residing at Nordhausen, Kingdom ofPrussia, Germany, have invented certain new and useful Improvements in Mortising-Machines,of which the following is a specification.

My present invention relates to portable mortising machines in which a suitably cased motorA maybe provided, geared toop- `erate a drillin'gtoo-l; a set 'of chisels being arranged to coact with the drillingv tool to completepthe mortise.y

n The' principal objects of my invention are to provide, by the disposition of parts,`a compact mortising machineinwhich aii electric motor may be suitably cased to protect the same from dust and shavings and/also to protect the operator'of the machine from the rotating parts of the motor; and, to provide means whereby the chisels of themachine may be swung and retained out of operative relation to the drilling tool, and the machine used as a driller or, when inoperative relation to the drilling tool, to complete the mortise started bythe latter. f

The machine is so constructed that th feeding of the tools to the material is done manually, thus providing the mortise without heating or undue wear upon` the tools. s

In `the drawings, forming a part of this specification :-Figure lis lfront elevation of a mortising machine embodyingyiny ink vention, its chisels being swung out of operative relation to the drilling tool. Fig. 2 is a cross sectional view taken on substank tially the line A-B ofy Fig. 1. 'Fig 3 isa vertical sectional viewon .the line C-B vof Fig. 1, the chisels being swung into operative relation to the drilling tool. Fig.4 4 is a plan view of a fan used in connection with 'the machine. Fig. 5 is a side elevation of themachine, looking toward the right of the same, as disclosed in'Fig. 1. kFig. 6 is a view similar to Fig. 5, but showing the tool actuating and supporting structure shifted relative to its clamping means for securing the machine to the work. Fig. 7 is a side elevation of the machine looking toward the left of the same as disclosed in Fig. 1. Fig. 8 is a view similar to Fig. 7, but showing the drilling tool bent downwardly. n

Similar characters refer to similar parts throughout thek several views.

lel with the axis of spindle 5,

Revolubly mounted in a casing7, is `a drive spindle 1 yoperatively connected to a spindle 5 through gear wheels 2 andy 3, rigidly carried by said spindles 1 and 5, respectively.` Carried by the casing 7 .and paralis a guide 8 having a verticallyr disposed slot 8' and a dovetail slot 8 adaptedto receivea yvertically movable member 4a, hereinafter termedy tool feeding member, which is provided with a dove-tailedportion 6 and a lateral eX-` tension 9, which work in the slots 8' yand 8 respectively, of the guidev8. The tool feeding member has an elongated bore 4 `axially alined with spindle 5.] Reciprocabley move-- ment is imparted to the toolfeeding member by means of a lever 10,' pivoted to the casing 7, as by links 10a oscillatabley about pivot 11, the lever 10 being pivotally connected to a stub shaft 9 of the extension 9, shown Vin Figs. 7 and 8 of the drawing.l

as yclearly,

As shown in Figs. 2 and 3 of the drawing,

the spindle 5 impartsrotation to a. sleeve 4, longitudinally movable with respect to the said spindle through a key and keyway, clearly shown in Figs. 2 and 3, or other suitable means. The said sleeve 4 is adapted toreceive a drilling tool 21,-and is disposed intermediate the spindle 5 and the tool feeding member 4a, and reciprocable 'with' the latter, through the collars 4b, but rotatively carried in the said bore 4c. y U

The tool feeding member 4? yis provided wit-h two oppositely kdisposed 'chisels 13 and 14, pivoted thereto, as at 15, equidistant from the sidesl and top of the` chisels. kThe chisels are connected by a bridging piece'13a, and areradapted to lie longitudinally adjacent the drilling tool, to coperate therewith to form a mortise, or to be swung out of operative relation to the drilling tool 21, where-v by the latter may be operated independently of the chisels. Catch mechanism, which comprises a pawl 18, pivoted to the kmember 4LL at 16 and normally held in engaging relation with either the top or one sideiof the chisel 13 by a spring 20 acting 'upon the projection 19 of the pawl 18, holds theychiselsy either in or out of operative relation to the the saine. As shown in Fig. 1, the pawlinay zontal position, after which the pawl isreturned to its normal position engaging -t-he side of the chisel 13, and through` bridge drilling tool. A handle 17 is carried ybyy v pawl 18 to facilitate manual actuation of piece 13a, holding them both in a set position. This locking action also takes place when the chisels are in a vertical position, as clearly shown in Fig. 3 of the drawing, the pawl 1S engaging the top of the chisel 13.

For the purpose of securing the machine to the work, for instance a beam, jaws 26 are provided which may be moved toward or.

from each other by rotating a screw spindle 27a, operatively connecting the jaws, in the usual manner, a crank 27 being provided to facilitate rotation of said spindle. The jaws 26 are movably carried by a carriage 2S, disposed transversely of the beam and movable at a right angle with respect to a carriage 30. This carriage 30 extends longitudinally of the beam and carries the casing 7, which latter may be moved longitudinally of said carriage. The jaws 26 are operatively carried by carriage 28; carriage 28 is operatively carried by carriage 30, and, the carriage is operatively carried by the casing 7 as by dove-tailing or other equivalent means.

Movement of that portion of the machine above carriage 2S, transversely of the beam, is accomplished by a screw spindle 29a, provided with a crank 29, which moves the can riage 30 with respect to the carriage 28. Movement of the casing 7 longitudinally of the carriage 30, and consequently longitudinally of the beam, is accomplished by means of the lever 21, pivoted to the casing 7, as by links 31,pivoted to stub shaft 33, the end of the lever 31 being pivoted, as by pin 32, carried by the carriage 30.

As shown in Fig. 3, the armature 23 of the motor spindle 1 has provided at its lower end, a fan 24. The casing 7 is provided with an air inlet 7 and outlet 25, the latter being arranged to direct the air generated by the fan to the working portion of the tools. A rheostat 34- may be provided to control the speed of the motor.

The operation of the machine is as follows The machine is secured to the work as previously described, and that portion of the material to be mortised is located directly under the drilling tool, by means of the crank 29 and lever 30, together with their coacting parts. The drilling tool is then rotated by means of the motor, its speed being controlled by rheostat 34, and the drilling tool is fed manually to the work by means of the lever 10. This drilling is followed by the use of the chisels which are reciprocated manually with the tool carrier 4a by the lever 10.

From the foregoing description, it is made manifest that I provide a mortising machine which may be used as a drilling machine, the construction being such that the chisels may be quickly swung to such a position as to not interfere with the free action of the drilling tool, and that the chisels or drilling tool may be operated independently of each other or in conjunction with each other.

I claim 1. In a mortising machine, the combination of a movable tool feeding member, means for manually reciprocating said tool feeding member, a drilling tool revoluble relative to said tool feeding member and -reciprocable therewith, a chisel pivotally carried by said tool feedingl member, normally positioned to lie longitudinally adjacent the said drilling tool to cooperate therewith to form a mortise, but adapted to be swung out of said normal position to permit the drilling tool to operate independently of said chisels, and mechanism for retaining said chisels either in or out of operative relation to said drilling tool, substantially as and for the purpose set forth.

2. In a mortising machine, the combination of a movable tool feeding member, means for manually reciprocating said tool feeding member, a drilling tool revoluble relative to said tool feeding member, but reciprocable therewith, two chisels pivotally carried by said tool feeding member,

normally positioned one at each side of said' drilling tool, to coperate therewith to form a mortise, but adapted to be swung out of said normal position to permit the drilling tool, to operate independently of said chisels, a bridge member connecting said chisels, and mechanism carried by said tool feeding member, operable upon one of said chisels to retain them both either in or out of operative relationto said drilling tool, substantially as and for the purpose set forth.

3. In a mortising machine, the combination of a reciprocable tool feeding member, a drilling tool revoluble relative to said tool feeding member, and reciprocable therewith, a chisel, means pivoting said chisel to said tool feeding member at a point equi-distant from the top and one side of the chisel, to normally position the same longitudinally adjacent the said drilling tool to coperate therewith to form a mortise, but adapted to be swung out of said normal position to permit the drilling tool to operate independently of said chisel, and a pawl carried by said tool feeding member adapted to engage either the top of said chisel or the said side thereof relative to which said pivoting means is positioned, to retain said chisels either in or out of operative relation to said drilling tool, substantially as and for the purpose set forth.

4. In a mortising machine, the combination of a reciprocable tool feeding member, a drilling tool revoluble relative to said tool feeding member and reciprocable there with, two chisels, means pivoting said chisels to said tool feeding member ata point equidistant from the top and side of eachV of Said chisels, t0 normally position the chisels longitudinally adjacent,`one at each side of said drilling tool to coperate therewith to form a mortise, but adapted to be swung out of said normal position to permit the drilling tool to operate independently of said chisel, a bridge member lconnecting said chisels, and a pawl carried by 'said tool feed-y ing member adapted to engage either the top of one of said chisels, or the said side thereof, relative to which saidy shifting means is positioned, to receive both of said chisels either in or out of operative relation to said drilling tool, substantially as and for the purpose set forth.

5. In a mortising machine, the combination of a spindle, a guide provided with a guide slot disposed parallel to the axis of said spindle, a tool feeding member movably carried by said guide and reciprocably guided by said guide slot thereof, a sleeve revolubl'e with said spindle but longitudinally movable with respect thereto and revolubly carried by said tool feeding member and reciprocable therewith, a drilling tool carried by said sleeve, chisels carried by said tool feeding member to coperatewith said drilling tool to form a mortise, and means for normally reciprocating said tool feeding member, substantially as and for the purpose setforth. Y ,f

In testimony whereof I have hereunto set my hand in presence Vof two subscribing witnesses.

Witnesses y ERNST EBER'HARDT, OsKAR HEIMANN.

Copies of th's patent may be obtained for ve cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

HERMANNt UNVERZAGT. 

